The National Monument at Vítkov on top of Vítkov Hill in Prague's Žižkov district is one of the most important buildings related to the development of Czechoslovak/Czech statehood.
It includes the third-largest bronze rider statue in the world, of Jan Žižka, who defeated the Catholic forces led by King Sigismund in 1420 at the Battle of Vítkov Hill. The Monument also includes the Ceremonial Hall, an exhibition entitled Crossroads of Czech and Czechoslovak Statehood, the Tomb of the Unknown Soldier and other exhibition halls.
The Monument was built from 1928 to 1938 in honor of the World War I Czechoslovak legionaries. After 1948, it was used to promote the communist regime. Between 1954 and 1962, it housed the mausoleum of Klement Gottwald. In 2000, the monument was acquired by the National Museum, which conducted a major restoration work. After over two years of reconstruction, the Memorial was opened to the public on 29 October 2009.
References:The ancient Argos Theater was built in 320 BC. and is located in Argos, Greece against Larissa Hill. Nearby from this site is Agora, Roman Odeon, and the Baths of Argos. The theater is one of the largest architectural developments in Greece and was renovated in ca 120 AD.
The Hellenistic theater at Argos is cut into the hillside of the Larisa, with 90 steps up a steep incline, forming a narrow rectilinear cavea. Among the largest theaters in Greece, it held about 20,000 spectators and is divided by two landings into three horizontal sections. Staircases further divide the cavea into four cunei, corresponding to the tribes of Argos A high wall was erected to prevent unauthorized access into the theatron and may have helped the acoustics, but it is said the sound quality is still very good today.
Around 120 CE, both theaters were renovated in the Roman style.